Surface pattern for the front of a control panel of a portable machine



FIG. 1 is a front elevational view of surface pattern for the front of a control panel of a portable machine showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left view thereof; and,

FIG. 6 is a right view thereof.

The broken line showing of elements are for illustrative purposes only and form no part of the claimed invention. 

The ornamental design for a surface pattern for the front of a control panel of a portable machine, as shown and described. 